Large thermal conductivity due to spins in the Haldane gap system Y2 BaNiO5

T. Kawamata; Y. Miyajima; N. Takahashi; T. Noji; Y. Koike

doi:10.1016/j.jmmm.2006.10.326

Large thermal conductivity due to spins in the Haldane gap system Y₂ BaNiO₅

T. Kawamata, Y. Miyajima, N. Takahashi, T. Noji, Y. Koike

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κ_a, of the Haldane gap system Y₂ BaNiO₅. As a result, we have observed thermal conductivity due to spins, κ_sp, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κ_sp may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.

Original language	English
Pages (from-to)	1212-1214
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 2
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.326
Publication status	Published - 2007 Mar
Externally published	Yes

Keywords

Haldane gap
Low-dimensional spin system
Thermal conductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2006.10.326

Cite this

@article{4d2941855cbe4cbd9839de2df0bc6dfd,

title = "Large thermal conductivity due to spins in the Haldane gap system Y2 BaNiO5",

abstract = "We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κa, of the Haldane gap system Y2 BaNiO5. As a result, we have observed thermal conductivity due to spins, κsp, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κsp may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.",

keywords = "Haldane gap, Low-dimensional spin system, Thermal conductivity",

author = "T. Kawamata and Y. Miyajima and N. Takahashi and T. Noji and Y. Koike",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan. One of the authors (T.K.) was supported by the Japan Society for the Promotion of Science.",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.10.326",

language = "English",

volume = "310",

pages = "1212--1214",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

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TY - JOUR

T1 - Large thermal conductivity due to spins in the Haldane gap system Y2 BaNiO5

AU - Kawamata, T.

AU - Miyajima, Y.

AU - Takahashi, N.

AU - Noji, T.

AU - Koike, Y.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan. One of the authors (T.K.) was supported by the Japan Society for the Promotion of Science.

PY - 2007/3

Y1 - 2007/3

N2 - We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κa, of the Haldane gap system Y2 BaNiO5. As a result, we have observed thermal conductivity due to spins, κsp, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κsp may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.

AB - We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κa, of the Haldane gap system Y2 BaNiO5. As a result, we have observed thermal conductivity due to spins, κsp, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κsp may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.

KW - Haldane gap

KW - Low-dimensional spin system

KW - Thermal conductivity

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